package com.yl.applicationsecurity.interceptor;

import com.yl.applicationsecurity.utils.JwtUtil;
import com.yl.applicationsecurity.utils.ThreadLocalUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;

@Component
public class LoginInterceptor implements HandlerInterceptor {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;



    public boolean preHandle(HttpServletRequest request, HttpServletResponse reponse
            ,Object handler)throws Exception {





        //令牌验证
        String token = request.getHeader("Authorization");
        try {

            //从redis中获取相同的token
            ValueOperations<String,String> operations =  stringRedisTemplate.opsForValue();
            String redisToken = operations.get(token);
            if(redisToken==null){
                //TOKEN失效了
                throw new RuntimeException();
            }

            Map<String,Object> claims = JwtUtil.parseToken(token);
            //把业务数据存储到ThreadLocal中
            ThreadLocalUtil.set(claims);
            return true;
        }catch (Exception e){
            reponse.setStatus(401);
            return false;
        }

    }


    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        ThreadLocalUtil.remove();
    }
}
